Tomb-Sweeping Day is a traditional festival in China. When is the exact date?

As a traditional solar term in China, Tomb-Sweeping Day determines the time according to15th day after the vernal equinox every year, that is,15th day after the vernal equinox. Therefore, Qingming falls between April 4th and 6th in the general solar calendar, with the 5th day as the majority. It is not fixed on April 5 of the solar calendar, nor is it determined by the lunar calendar.